doc: Clean up title case use

Author: petere

doc/src/sgml/config.sgml

@@ -7669,7 +7669,7 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv;
      </para>
 
      <table id="runtime-config-logging-jsonlog-keys-values">
-      <title>Keys and values of JSON log entries</title>
+      <title>Keys and Values of JSON Log Entries</title>
       <tgroup cols="3">
        <thead>
         <row>

doc/src/sgml/ref/pgbench.sgml

@@ -1023,8 +1023,8 @@ pgbench <optional> <replaceable>options</replaceable> </optional> <replaceable>d
  <refsect1>
   <title>Notes</title>
 
- <refsect2 id="transactions-and-scripts" xreflabel="What is the &quot;Transaction&quot; Actually Performed in pgbench?">
-  <title>What is the <quote>Transaction</quote> Actually Performed in <application>pgbench</application>?</title>
+ <refsect2 id="transactions-and-scripts" xreflabel="What Is the &quot;Transaction&quot; Actually Performed in pgbench?">
+  <title>What Is the <quote>Transaction</quote> Actually Performed in <application>pgbench</application>?</title>
 
   <para>
    <application>pgbench</application> executes test scripts chosen randomly